Synergistic Emulsion Polymer Formulation and Aqueous Coating/ Paint Compositions Involving the Same

Abstract

A synergistic emulsion polymer formulation adapted for facilitating achieving desired open time or wet edge time of any aqueous coating/paint composition on application to thus result in improved workability of the coating/paint composition. The synergistic emulsion polymer formulation and the coating/paint composition including the same comprises a latex polymer derived from copolymerization of mono-ethylenically unsaturated monomers. This in combination with select sorbitol ethoxylates esterified with fatty acids as an ingredient in the formulation/composition favors the slowing down of water evaporation from the composition considerably so that it remains amenable to touch up even after several minutes of application.

1 . A synergistic emulsion formulation adapted for facilitating achieving desired open time or wet edge time of any aqueous coating/paint composition on application comprising a latex copolymer in combination with sorbitol ethoxylates esterified with fatty acids. 
     
     
         2 . The synergistic emulsion formulation according to  claim 1 , wherein the sorbitol ethoxylates esterified with fatty acids is selected from a class of sorbitol ethoxylates esterified with fatty acids having the general formula, C 6 H 8 (OH) 6-b (OCH 2 CH 2 ) m (R 1 COO) b , wherein b is an integer from 1 to 6, R 1  is a hydrocarbon group comprising a straight chain of alkyl groups having 6 to 22 carbon atoms and m is in the range of 4 to 60. 
     
     
         3 . The synergistic emulsion formulation according to  claim 2 , wherein the number of oxyethylene groups (OCH 2 CH 2 ) denoted by the value m is preferably in the range 40 to 60. 
     
     
         4 . The synergistic emulsion formulation according to  claim 1 , wherein the sorbitol ethoxylates esterified with fatty acids are incorporated in the amounts of 0.1% to 10% in the formulation. 
     
     
         5 . The synergistic emulsion formulation according to  claim 1 , wherein the latex copolymer is film forming, and wherein the latex copolymer having a glass transition temperature in the range of −15° C. to +50° C. is obtained from ethylenically unsaturated monomers. 
     
     
         6 . The synergistic emulsion formulation according to  claim 1 , wherein the latex copolymer is obtained from ethylenically unsaturated monomers selected from at least one or more of: a) acrylic acid esters and methacrylic acid esters of alcohols having 1 to 18 carbon atoms;
 b) hydroxy alkyl acrylates;   c) mono ethylenically unsaturated hydrocarbons; and   d) acid monomers.   
     
     
         7 . A process of manufacturing a synergistic emulsion formulation according to  claim 1 , involving latex copolymer comprising ethylenically unsaturated monomers and select sorbitol ethoxylates esterified with fatty acids, and wherein the step of providing the sorbitol ethoxylates esterified with fatty acids in combination with a latex copolymer comprises either:
 (i) incorporating the sorbitol ethoxylate esterified with the fatty acid at the time of polymerization; or   (ii) incorporating the sorbitol ethoxylates esterified with the fatty acid post polymerization.   
     
     
         8 . A synergistic aqueous coating/paint composition having a desired open time or wet edge time on application comprising:
 (a) a synergistic emulsion formulation comprising a latex copolymer in combination with sorbitol ethoxylates esterified with fatty acids; and   (b) a coating/paint formulation.   
     
     
         9 . The synergistic aqueous coating/paint composition according to  claim 9 , wherein the desired open time or wet edge time of the composition on application is in the range of 5 to 6 minutes. 
     
     
         10 . A process of manufacturing the synergistic aqueous coating/paint composition having the desired open time or wet edge time on application according to  claim 9 , comprising the steps of:
 (i) providing the synergistic emulsion formulation comprising a latex copolymer in combination with sorbitol ethoxylates esterified with fatty acids; and   (ii) adding the synergistic emulsion formulation from step (i) to the aqueous coating/paint formulation.   
     
     
         11 . A process of manufacturing the synergistic aqueous coating/paint composition having the desired open time or wet edge time on application according to  claim 9  comprising the steps of:
 I. preparing the latex copolymers involving the steps of:
 (a) providing one or more monomers for polymerization; and 
 (b) obtaining the latex copolymers therefrom, comprising pre-emulsion of the latex copolymers; and 
 
 II. preparing the synergistic aqueous coating/paint composition involving the sorbitol ethoxylate esterified with the fatty acids and the latex copolymer obtained from step (I). 
 
     
     
         12 . The process of manufacturing the synergistic aqueous coating/paint composition according to  claim 11 , wherein the sorbitol ethoxylates esterified with fatty acids are incorporated in the amounts of 0.1% to 10% in the composition. 
     
     
         13 . A method of coating/painting any surface using the synergistic emulsion formulation adapted for facilitating achieving a desired open time or wet edge time according to  claim 1 , comprising the steps of:
 (i) providing the emulsion formulation comprising a latex copolymer in combination with the sorbitol ethoxylates esterified with fatty acids; and   (ii) incorporating the emulsion formulation in a coating/paint formulation and thereafter applying it on a surface to attain the desired open time or wet edge time, the desired open time or wet edge in the range of 5 to 6 minutes.